Incandescent-lamp holder.



PATEN TED JULY 9, 1907- E. E...MAR SH.

INGANDESGBNT LAMP HOLDER.

APPLICATION FILED APR. 24,1905.

" lllhllTElB PATENT ELMER EDWARD MARSH, OF NEWPORT, KENTUCKY, ASSIGNOR'iO FREDERJ'GK U. KINGSBURY, OFCOLUMBUS, OHIO.

INCANDESUENT-LAMP HOLDER.

Specification of Letters Fatent.

Application filed April 24, 1905. $B1ialll0. 257177.

Patented July 9, 190?.

To all'who'm it may concern:

'Bo it known that I, ELMER Enwmm .MARSII, a citizen of tho United Statesof America, and a resident oi Newport, in the county of Campbell andState of Ken tuckyhave invented certain new and useful improvemonts inIncandescent-Lump Holders, of which the following is a specification. I

This invention relates to certain improvements in that class of holdorswhich are especially (losignod for use in. connoctiou with incandescentelectric-lamps and which permit of adjustment to acoommodato dillor- (mtpositions in which it is desirable to hold tho lamp for use, and theohjoct of tho invontion is to provido a holdor of this gonoraflcharactor of an improved and simpliliod construction Whorohy the lampmay ho moro convoniontly and roadily adjustod in various dosirodvpositions [or uso and, also, securely hold againstl1t.(ldentaldisplacomont when the desired adjustment has onco boon el'foctod.

'lho invontion consists in certain novol looturos of tho construction,mmthination and arrangomont of tho sovoral parts of tho improvodhunp-holdor, whorohy oortain important arlvantagos are attainod and thedo vico is rondorod simplor. ohoapor and olhoriviso hottor adaptod andmoi-o oonvoniont l'or uso, all as will he ln-roinal'lor fully notl'orth.

upward for illustration of tho univorsal-Hmnoction of tho uppor oudolsaid atom; Fig. 4 is an onlargoil partial soction takon axiallythrough tho adjustahlo stom and showing; tho in'l'angomont for guidingtho oud oi tho inolosod tolosoopio-oxtonsion ihoroot'; and -l ig. 5 adolaohod, lraomoulary dot-ail viow ol tho'lamp-socln-t (lamp or clip attho lowor ond of tho adjustable stom of tho holdoix I In thoso viows, lindioatos a coiling \'all or othor Ft![)pultlllg -filll'l ttt'ti towhich the improvod lamp-lioldor is attaohod i'oi' nuo and 2 indioatoa,as a wholo, a pondont lnackot l'ormod from motul with lugs 3. ii atnpposilo sidos for scrow-attaohmonl to said supporting-surlaoo, saidhraokot 2 hoing oonstrui-tod with pondont or downWardly-oxtomloilparallol and'spacod arms or bars 4, 'l, tho lowor onds ol' \vhioh arointogrally-o'onnootod with opposite sidos ot a ring onumuhn' portion 5which has pendent or downwardlyextended and inwardly-ourvod arms orprojootons (l, G a ngod at intorvals around it, thoro being, as horoiushown, l'our oi said arms (5, (5, although it is ovidout any doai rodnun1- bur may ho omployod.

'lho zmns (l, (i am integral with the ring or annular port 5 and upontho upper odgol'if said part 5 lhoro are 'n'oduood other similarlyspat-oil but upright lugs or projections '7. 7, whioh are, howovor, ofloss longth than tho arms 6. Tim ring or annular part5l'orms; cllCllltlllioaring-momhor whoroin is hold for univorsal movemont a hollow hall orsphoro ll oonnoolod, as will ho prosonlly oxphtinod, with tho uppo'r ondof tho adjust ohio rod or stom of tho holdon and tho inward curvatnxo oitho lowor arms 6, (l of tho ring 5 i =ulliciont to so ouroly hold saidsphoro 8 suspondod w in said ring 5 Whilo pormitling iroo movomontihoiogu' in various diroctions within the ring.

ll indication a frictional boat-inganonihor oi invortod oup iiko orhollow homi-sphori allorm and Within whoso undor convoxity is adapted tosnugly lit and turn tho sphorica uppor ourl'auc of tho hail t and saidmomhor t) has around its ,lou'or odgo portion a doponding llango orshirt ltl adaptod to talio iusido tho upright spaced lugs 7, 7 on thotop ol ring 5, in such way as to provont latoral displm'omont of thofi'iclional-im-mhcr El from tho lli';(l(l'l \'lll hall 8 during the"various movomoms nooosaary [or said hall in tho adjuatmoiit of thoimprovod holdor. 'lho l'riotional l oaring-memhor t) is also proi-idodwith an odo-o tlang'; or horizontal port-ion lt ouisido tho poudonlllango or ltirt, l0, and said odgo l5 produood at tho uppor onds of tho\tltlt'lll Sidodnn's i, l of tho lnzu'lcot 22.

Ill; is a out. having 'iO\\'-;\ilj\lr-'l mont upon the lower tlu'omlodond oi atom l3. and l7 is :1- spring coilocl on said .lt*!i1 l3holihooi. tho nut ill and tho strap or yolio l with its tonsion oxortodon tho nut in such a way as to hold tho momhor ll oloh-ol y pi'ossod infrictionalongagoniont upon tho sphoi'ioal t p Mn'l'aco ollh ball t5v 3yturning tho nut Hi, tho springaousion may evidontly ho \ariod lo!("aiming tho momhor 9 to boar with groator or loss l'orco upon tho saidhall 8.

it; indioatos tho ontor main momhor or alcove cont prisod in thoadjustahlo rod or lamp-lwlding stom of tho iinpl'mod holdor, and thoupper ond of said sloovo or member 18 has threaded-engageinent, asindicated at 19 in dotted-lines in Fig. 1, with the lower central partof the ball 8 so that the holding rod or stem is caused to depend belowthe bracket 2.

20 indicates the interior telescopic-member of the adjustable holdingrod or stem, and this inner member is of a diameter less than the boreof the sleeve 18 so as to permit of being slid upwards in said bore inthe position seen in dotted-lines in Fig. 1, so that the holder rod orstem may be thereby shortened, a reverse sliding-movement of the innermember 20 serving for its withdrawal from the lower end of sleeve l8 inlengthening said holder rod or stem.

The upper end of the inner member 20 has a reduced part 21 on which isheld a leather or other washer 22 adapted to prevent lateral play of theinner member within the larger bore oisleeve 18 without impeding themovement of said inn r member in lengthening and shortening the holderrod or stem and the lower end of said inner member 20 is extended downbelow the lower end of sleeve 18 through a perforated cap 23 screwedolnsl'eeve 18, a spring 24 being coiled on the inner member 20 withinthe hollow of the cap with its turns or spirals arranged to frictionallybear on the said inner 1nember'20 to irictionally impede theslidingmovement thereof within sleeve 18. The upper end of said spring24 bears on the extremity of sleeve 18 and when the screw-cap 23 turned,a certain adjustment of said spring will be effected whereby 'it may becaused to bear on the inner member 20 with greater or less tension sothat more or less force will be necessary for withdrawingthe member 20from sleeve 1.8 or sliding said member within said sleeve in thelongitudinal adjustment of said parts for lengthening and shortening thestem of the holder. A

The lower extremity 25 of the inner stern-member 20 is perforated forthe passage of a clamping-screw 27 seen in Figs. 1 and 5 and by mean ofsaid screw 27, clamping-arms 26, 26 are held to opposite sides of saidlower perforated end 25o? said inner member 20, the arrangement beingsuch that when said screw 27 is loosened, the clamping-arms may beadjusted pivotally upon the said member 20 as indicated in dotted-linesat y in Fig. 1 and when'any such adjustment desired has been effected,said screw 27 may be again tightened to hold the parts locked inposition. The rod 20 may also be rotated in the sleeve i8 iorfacilitating such adjustmeut, and the universal connection afforded by'the construction at the upper end of the stem above described permitsthe adjustment of said stem at. any desired angle as indicated indottedlines at .1: in Fig.

l the frir-tional-engagem ent of l earing-n'iember 9 with ball 8 servingto hold the holder-stem in the desiredadujstcd position as willbereadily understood.

The clamping-arms 26, 26 constitute a clamp or clip by means of which anincandescent lamp 30 is supported at the lower end of' the holder-stemand for this purpose, said arms 26 have rr'everselymurvcd end portions28, 28 connected by a set-screw fl] and adapted for clamping-engagementon opposite sides of the lamp-soclret 29, the screw 31 being-adapted to,be turned to permit. the socket to be tightly gripped between the jaws28 of theclamp. I

252 indicates the conductors extended from the lampsocket 29 through aloop or eye 33 at the lower end of 36 on the upper part of sleeve 18,and 37 indicates a coil-spring of sufiicient strength, one end of whichiscon'nected with the said shaft or stud 35 while its opposite end hasconnection with the clip 36, the tension of said spring being exerted towind up the conductors 32 upon the spool or reel 34 so as to preventsagging of the conductors when the holder-stem is shortened. 38indicates the portion of the conductors extended from the spool or reel34 to an insulator 39 at the-ceiling or other supporting surface 1. Y

The iinproved lamp-holder constructed according to my invention is of anextremely simple and inexpensive nature and is especially well adaptedfor use by reason of the ease and convenience with which the lamp may beadjusted in any desired position and also of the scci lity with whichthe lamp is held against displacementwhen in adjusted positionfthespringtension devices piovided at the upper and lower ends of the sleeveserving to effectively counterbalance the weight of the lamp and of theseveral parts of the holder and being capable of ready adjustment inorder that 'looseness resulting from wear or careless handling of thedevice may be readilytakcn up.

.i claim:

1. A device of the character described, comprising a sup portingbracket. having adjacent one end thereof an open circular bearing memberand adjacent the other end thereof a cross-bar with a central openingthercthrough, n spher-,-

leal member adjustnbiy positioned in the bearing member. a hemisphericalshell member positioned in said bracket and adapted to frlctionaliyengage suld spherical member and havlng'nn external circumferentialflange adjacent the edge thereof, a stem adapted to engage saidhemlspherical shell with one of its ends and said opening in saidcross-bar with its-other end, a spring curried by said stem, aseries ofprojections carried by said bearing member and :idapted'to engnge theedge of said hemispherical member, and a lanip-holder-stem carried bys'uid spherical member. I n 2. A device of the character described,comprising a Human-ting bracket having adjacent one end thereof a'circular bearlm: member provided with a series of spaced upturnedprojections and a serles 0!,pendent arms, a

spherical body seated loosely within said circuhuhearing member andengaged by said'pendent arms, a frictional member having a concavesurface iltting'over said sphericul member and having u skir t-llkeiiange adopted to engage the inner faces of said upturned. projections,elastic means for maintaining the engagement of said frictional memberwith said spherical member, and n lump-holder rod carried by saidspherical member. i

ii. A device of the clm rzlcter described, comprising a biuckethaving anopen, circular bearing: member, aspherlcnl member loosely seuted in saidbearing member and having a lamp vholder rod projecting therefrom, africtlo'nal member liavlng a cdncnv'e surface iittlm: o'v'er saidsphericnimember, a pin having one end in sliding engagement with anoriliced cross-bar on said bracket and having its other end inadjustable engagement with said i'l'lctlolull member, a not on said pin,and (1 spring coiled on said pin I and engaging said nut at one end andsaid crossbar on said brucketnt its other end.

Signed at Cincinnati, 'Ohio, this zlst day oi Apribl'JU-r. 1 I IGLMEREDWARD MARSH. 'Witness T I Join: rim/ls Jones, Witunii Scnucimno'r.

